Here is a dumb one...when I got the car home (didn't have the manual in the car, got it later) I couldn't figure out how to turn the car off. I found out:
1. Comfort access start is a quick tap on the Start button.
2. Tried to shut the car off the same way, brief touch of Start/Stop button, car shuts off but stupid stereo still runs - car is in RADIO MODE
3. Forum board was kind enough to instruct me that you press and HOLD that button to completely shut everything down. Also found out that second tap of button turns it off.